@misc{rfc1619,
    series =    {Request for Comments},
    number =    1619,
    howpublished =  {RFC 1619},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC1619},
    url =       {https://www.rfc-editor.org/info/rfc1619},
    author =    {William A. Simpson},
    title =     {{PPP over SONET/SDH}},
    pagetotal = 5,
    year =      1994,
    month =     may,
    abstract =  {This document describes the use of PPP over Synchronous Optical Network (SONET) and Synchronous Digital Heirarchy (SDH) circuits. {[}STANDARDS-TRACK{]}},
}